Method and device for indicating pixel, and method and device for processing pixel indication
Disclosed are a method and a device for indicating a pixel, and a method and a device for processing a pixel indication, in video encoding and decoding. A process of indicating a pixel by an encoder includes the steps of: determining at least one processing sub-interval, determining at least one processing sub-interval to be indicated, and indicating the at least one processing sub-interval to be indicated. A process of processing a pixel indication by a decoder includes the steps of: acquiring processing sub-interval indication information, determining at least one indicated processing sub-interval, and determining all of the at least one processing sub-interval. Under the premise that flexible selection of at least one processing sub-interval is guaranteed by applying the above-mentioned technical solutions according to embodiments of the present invention, indication information of the at least one processing sub-interval to be indicated, which is transmitted, is reduced. As a result, video compression performance is improved.
1. A method of processing pixel indication performed by at least one processor, the method comprising:
obtaining, from a bitstream, processing sub-interval indication information comprising processing sub-interval information and processing sub-interval derivation information; and
determining indicated processing sub-intervals according to the processing sub-interval indication information and determining a remainder of processing sub-intervals except for the indicated processing sub-intervals from among all of the processing sub-intervals,
wherein the indicated processing sub-intervals include a first indicated processing sub-interval and a second indicated processing sub-interval,
wherein when the indicated processing sub-intervals are determined, the first indicated processing sub-interval is determined according to the processing sub-interval information, and the second indicated processing sub-interval is determined by adding a value of the processing sub-interval information to a value of the processing sub-interval derivation information plus 2,
wherein a pixel value range is divided into sub-intervals, and all of the processing sub-intervals are a part of the sub-intervals,
wherein the processing sub-interval information includes information which indicates a first index of an indicated processing sub-interval, and the processing sub-interval derivation information includes information which is combined with the processing sub-interval information to derive a second index of the indicated processing sub-interval, and
wherein the processing sub-interval derivation information indicates difference, between an index of the first indicated processing sub-interval and an index of the second indicated processing sub-interval, minus 2.
2. An apparatus for processing pixel indication, the apparatus comprising:
at least one processor configured to obtain, from a bitstream, processing sub-interval indication information comprising processing sub-interval information and processing sub-interval derivation information, to determine indicated processing sub-intervals according to the processing sub-interval indication information and to determine a remainder of processing sub-intervals except for the indicated processing sub-intervals from among all of the processing sub-intervals,
wherein the indicated processing sub-intervals include a first indicated processing sub-interval and a second indicated processing sub-interval,
wherein when the at least one processor determines the indicated processing sub-intervals, the first indicated processing sub-interval is determined according to the processing sub-interval information, and the second indicated processing sub-interval is determined by adding a value of the processing sub-interval information to a value of the processing sub-interval derivation information plus 2,
wherein a pixel value range is divided into sub-intervals, and all of the processing sub-intervals are a part of the sub-intervals,
wherein the processing sub-interval information includes information which indicates a first index of an indicated processing sub-interval, and the processing sub-interval derivation information includes information which is combined with the processing sub-interval information to derive a second index of the indicated processing sub-interval, and
wherein the processing sub-interval derivation information indicates difference, between an index of the first indicated processing sub-interval and an index of the second indicated processing sub-interval, minus 2.